Denis Semenov worked on the apache/iceberg-rust repository, focusing on enhancing API usability and DataFusion integration using Rust. During this period, Denis delivered a feature that made the convert_filters_to_predicate function publicly accessible within the DataFusion integration API. This change, implemented as a visibility adjustment without altering underlying logic, allowed external users and downstream components to directly reuse the filter conversion logic. By exposing this functionality, Denis improved interoperability and reduced integration friction for other tools and pipelines. The work demonstrated a targeted approach to expanding API accessibility while maintaining stability, leveraging skills in Rust and DataFusion integration throughout the process.